For a highway bridge over a railroad, the governing regulation is Â§646.214(a)(2), The State transportation agency should follow its normal specifications, design standards, and guidelines for Federal-aid highway projects.
Pregnancy in dogs typically lasts 63 days (about nine weeks). The duration of a dog's pregnancy can fall in the range of 58 to 68 days.Though estrus (heat cycles) can vary from breed to breed, the normal gestation period falls within the same range for all dogs, regardless of breed.1  Most dogs will show no signs of pregnancy in the first several weeks.ow Long is a Dog's Pregnancy? Pregnancy in dogs typically lasts 63 days (about nine weeks). The duration of a dog's pregnancy can fall in the range of 58 to 68 days. Though estrus (heat cycles) can vary from breed to breed, the normal gestation period falls within the same range for all dogs, regardless of breed.
puppies image by Bobi from Fotolia.com. The period of pregnancy in dogs is called gestation. During gestation the puppies develop in the mother's uterus. Average gestation in dogs lasts approximately nine weeks, or 63 days. However, puppies can be born as early as 58 days or as late as 68 days.nlike humans, pregnancy in dogs cannot be confirmed with a urine or blood test. Instead, veterinarians rely on feeling a dog's abdomen 26 to 35 days after breeding for signs. However, this proves only 85 percent accurate. Owners may need to wait 45 days after breeding to see true confirmation on an X-ray.